Biomedical Engineering > GATE 2022 > Pulse Oximetry
Which of the following statements related to the operating principle of pulse oximetry are CORRECT?
A
Pulse oximeter can non-invasively determine arterial oxygen saturation (SpO2) by analyzing the light transmitted through the skin during the systolic phase of the blood flow through the tissue
B
In a pulse oximeter, isosbestic wavelength is the wavelength at which Hb and HbO2 have same optical absorbance
C
Pulse oximeter can accurately determine the SpO2 of blood by computing the ratio of absorbances at 660 nm and 905 nm wavelengths
D
Pulse oximeter can accurately determine the SpO2 of blood by computing the ratio of absorbances at 850 nm and 950 nm wavelengths

Correct : a, b, c

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